I have nine 12 week old guineas. I think I have 4 females and 5 males. One of them is being outcast by the others. My guess is it is one of the males. They all seem fine in the coop and roost together. When they get outside in the large run however, they won't let this one get too close to them. They will chase him to the far end or he will go back in the coop. He is eating and doing fine, just seems to be the outcast. Any ideas?